NAD VISO FIVE Service Manual page 49

FET : IC14(HN1K05FU)
Equivalent Circuit
6
Q1
1
(Q1, Q2 common)
Switching Time Test Circuit
(a) Test circuit
1.5 V
IN
0
10 ms
V
IN
(top view)
5 4
Q2
2 3
I
D
OUT V = 1.5 V
DD
D.U. < = 1%
V : t , t < 5 ns
IN r f
(Z = 50 W)
out
Common Source
V
DD
Ta = 25°C
Marking
6 5 4
KK
1 2 3
(b) V
IN
V
GS
(c) V
OUT
V
DS
2-37
1.5 V
90%
10%
0
V
DD
90%
V
DS (ON)
t
r
t t
on off
10%
t
f